Population growth

Question 1

What is the difference between an open and closed population?

Answer 1

open population allows immigration and emigration, closed does not, so population is only determined by birth and mortality

Question 2

what does lamba represent in the geometric population growth model?

Answer 2

the geometric rate of increase (mean number of offspring per individual)

Question 3

What are the 2 assumptions of the geometric population growth model

Answer 3

birth rate is always greater than death rate, and birth and death rates are not effected by population size

Question 4

Give 2 reasons why population growth can’t be modelled geometrically

Answer 4

resources deplete when populations get high, and animals must mature before reproducing

Question 5

Give 3 assumptions of the exponential population growth model

Answer 5

no immigration/emigration, no death due to limited resources, population only due to birth rate and death rate